US2580244A - Mineral insulated conductor workpiece - Google Patents

Mineral insulated conductor workpiece Download PDF

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Publication number
US2580244A
US2580244A US779912A US77991247A US2580244A US 2580244 A US2580244 A US 2580244A US 779912 A US779912 A US 779912A US 77991247 A US77991247 A US 77991247A US 2580244 A US2580244 A US 2580244A
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US
United States
Prior art keywords
metal
dielectric
tube
manufacture
piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US779912A
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English (en)
Inventor
Roberts Edwin Gilber Llewellyn
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2580244A publication Critical patent/US2580244A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/16—Rigid-tube cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49808—Shaping container end to encapsulate material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]
    • Y10T428/12264—Intermediate article [e.g., blank, etc.] having outward flange, gripping means or interlocking feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]
    • Y10T428/12271—Intermediate article [e.g., blank, etc.] having discrete fastener, marginal fastening, taper, or end structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12611—Oxide-containing component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2958—Metal or metal compound in coating

Definitions

  • granular ⁇ dielectric crypto-crystalline material being isotropic land amorphous and ,possessing plastic and fluid properties, land means closing vat both ends themetal tube filledwith the granular dielectric crypto-crystalline material.
  • Figure 1 is a vertical section of a tubular body tted with a pair of conductor rods.
  • Figure 2 is a similar view illustrating the body partially lled with insulating material or dielectric, and the ram used for pressing the same into a compact condition.
  • Figure 3 is a similar View illustrating the body filled to the desired extent and with a metallic sealing disc in position
  • Figure 4 is a similar view illustrating the means for closing the end of the tubular body over the top of the sealing disc and for bringing the insulating material up to the required density for its occupied volume.
  • the work-piece comprising the tube l and conductor rods 3 is loaded with insulating material or dielectric 5 consisting of gamma alumina, which material as before stated is isotropic or amorphous, and is in a granular form, such material being hereinafter referred to as the dielectric material.
  • insulating material or dielectric 5 consisting of gamma alumina, which material as before stated is isotropic or amorphous, and is in a granular form, such material being hereinafter referred to as the dielectric material.
  • T-h'e dielectric material is normally obtained incommercein the 'form of alin'ely divided powden-and requires treatment before it is suitable for the purposes of Amy invention.
  • a convenient method of bringing the flnely divided powder into the .granular form - is first to agglomerate the same by dry pressing or moulding as is common in ceramic technique and then to disintegrate the same by a crushing operation designed to reduce it to an aggregate so that the particles will pass through a circular aperture of approximately onequarter of an inch in diameter.
  • the completed work-piece can be drilled with small holes at both ends to enable the free egress of Water (if any) vapour and gases, when it is heated.
  • said work-piece can be either dried to expel the mechanically held or chemically combined Water and occluded gases previous to heating to the necessary temperatures required to roll it in the hot condition, or, it can be slowly heated up to that temperature in one operation.
  • Such rolling temperature ranges from 800 to 900 C. in the case of copper sheaths and conductors.
  • An article of manufacture adapted to be used as initial Work-piece in a process for the manufacture of metal clad mineral insulated conductors by the reduction in cross-section of such initial work-piece comprising in combination, a metal tube; granular gamma alumina filling said metal tube; and closing means closing at both ends the metal tube filled with said granular gamma alumina.
  • An article of manufacture adapted to be used as initial work-piece in a process for the manufacture of metal clad mineral insulated conductors by the reduction in cross-section of such initial work-piece comprising in combination, a metal tube being open at one end and composed of a metal cylindrical Wall and a metal end Wall provided at one end of said metal cylindrical wall and forming one unitary structure with said metal cylindrical Wall of said metal tube closing the same at its other end; a granular dielectric crypto-crystalline material consisting of gamma alumina filling said metal tube, said granular dielectric cryptocrystalline material being isotropic and amorphous and possessing plastic and fluid properties; and closure means closing said open end of said metal tube lled with said granular dielectric crypto-crystalline material.
  • An article of manufacture adapted to be used as initial Work-piece in a process for the manufacture of metal clad mineral insulated conductors by the reduction in cross-section of such initial work-piece, said article of manufacture comprising in combination, a metal tube being open at one end and composed of a metal cylindrical Wall and a metal end wall provided at one end of said metal cylindrical Wall and forming one unitary structure with said metal cylindrical wall of said metal tube closing the same at its other end; a granular dielectric crypto-crystalline material consisting of gamma alumina filling said metal tube, said granular dielectric crypto-crystalline material being isctropic and amorphous and possessing plastic and uid properties; closure means closing said open end of said metal tube lled with said granular dielectric crypto-crystalline material;

Landscapes

  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Metal Extraction Processes (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US779912A 1946-10-24 1947-10-15 Mineral insulated conductor workpiece Expired - Lifetime US2580244A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB269915X 1946-10-24

Publications (1)

Publication Number Publication Date
US2580244A true US2580244A (en) 1951-12-25

Family

ID=10252412

Family Applications (1)

Application Number Title Priority Date Filing Date
US779912A Expired - Lifetime US2580244A (en) 1946-10-24 1947-10-15 Mineral insulated conductor workpiece

Country Status (4)

Country Link
US (1) US2580244A (en, 2012)
CH (1) CH269915A (en, 2012)
FR (1) FR954657A (en, 2012)
GB (1) GB637647A (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761949A (en) * 1954-09-29 1956-09-04 Fluid Systems Inc Prefabricated pipe system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949071C (de) * 1950-10-19 1956-09-13 British Insulated Callenders Isolierte elektrische Leiter

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US573176A (en) * 1896-12-15 Francois borel
US1127281A (en) * 1910-07-19 1915-02-02 Gen Electric Resistance-wire for electric heaters.
US1157916A (en) * 1914-08-24 1915-10-26 Gen Electric Insulated wire and terminal therefor.
US1192457A (en) * 1910-07-19 1916-07-25 Gen Electric Resistance-wire for electric heaters.
US1279252A (en) * 1916-04-18 1918-09-17 Gen Electric Resistance element.
US1809089A (en) * 1928-08-23 1931-06-09 Edwin L Wiegand Method of producing electrical heating elements
US1993580A (en) * 1929-12-03 1935-03-05 Gen Electric Electric terminal connection and method of making the same
US2091839A (en) * 1935-10-24 1937-08-31 Edison General Elec Appliance Electric heater
US2123778A (en) * 1934-12-12 1938-07-12 Alsacienne Constr Meca Electric wire
US2279726A (en) * 1939-10-26 1942-04-14 C O Two Fire Equipment Co Method of making lightweight cylinders
US2431474A (en) * 1944-10-05 1947-11-25 Bbc Brown Boveri & Cie Composite insulating bushing

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US573176A (en) * 1896-12-15 Francois borel
US1127281A (en) * 1910-07-19 1915-02-02 Gen Electric Resistance-wire for electric heaters.
US1192457A (en) * 1910-07-19 1916-07-25 Gen Electric Resistance-wire for electric heaters.
US1157916A (en) * 1914-08-24 1915-10-26 Gen Electric Insulated wire and terminal therefor.
US1279252A (en) * 1916-04-18 1918-09-17 Gen Electric Resistance element.
US1809089A (en) * 1928-08-23 1931-06-09 Edwin L Wiegand Method of producing electrical heating elements
US1993580A (en) * 1929-12-03 1935-03-05 Gen Electric Electric terminal connection and method of making the same
US2123778A (en) * 1934-12-12 1938-07-12 Alsacienne Constr Meca Electric wire
US2091839A (en) * 1935-10-24 1937-08-31 Edison General Elec Appliance Electric heater
US2279726A (en) * 1939-10-26 1942-04-14 C O Two Fire Equipment Co Method of making lightweight cylinders
US2431474A (en) * 1944-10-05 1947-11-25 Bbc Brown Boveri & Cie Composite insulating bushing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761949A (en) * 1954-09-29 1956-09-04 Fluid Systems Inc Prefabricated pipe system

Also Published As

Publication number Publication date
CH269915A (de) 1950-07-31
FR954657A (en, 2012) 1950-01-04
GB637647A (en) 1950-05-24

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